The greatest shonen ever and one of the greatest manga ever.
I'll make it no secret that Rurouni Kenshin is my most favorite anime of all time. I used to say that Neon Genesis Evangleion was my favorite but that was mostly because it brought me into anime; then I said Full Metal
Alchemist Brotherhood but that was because FMAB had a truly great and very well written story. However, after rewatching the series and admitting it has SOME flaws, I reconsidered and declared Kenshin to be my most favorite anime.
No anime lead me to google so much about it or to analyze it's themes so much; no anime affected me so much with it's philosophy and characters, except for maybe Neon Genesis Evangelion but whereas Evangelion made me depressed, Kenshin actually taught me how to live, how to grow stronger and be happy. Few anime have such a great and well developed cast characters with one of the greatest protagonsits ever created. Seriously, Kenshin is to anime what Superman is to comic books.
Yes, it has some flaws, none of which detract away from the story as I don't recall anyone acting like an idiot or doing a stupid decision. The biggest flaw in Kenshin is, especially in early episodes of the anime, the narration of the obvious. Even I got tired of how the characters would constantly say how strong and inhuman Kenshin is or what he just did. This doesn't count for when the characters talk about the chocies they make throughout life or how they live it because honestly, I love those bits. They make the battle more intense and make it more magnificent; the battle between Kenshin and Soujiro the Tenken would not have been half as good without Soujiro breaking down. Another flaw of the anime were some unbelievable villians like Raijuta and Fuji but they still provided some good scenes. Overall, Kenshin has very few flaws and the good stuff is so excellent and well executed it overshadows even the bad filler arcs from the later parts of the anime. Plus, the Jinchuu arc in the manga was one of the greatest endings to anything with a very suspenseful battle and deep meaning behind it.
Overall, I give Kenshin a 9.5 out of 10 if not a 10. It really is highly recommended if you want to lead a good life and be entertained.